A successful brain surgeon with a seemingly perfect family faces the limits of unconditional love when he discovers his teenage son may be planning a violent attack at school.

James Cole, a time traveller from a dystopian, plague-ravaged future, arrives in the present on a desperate mission to change the course of history.

Cal Lightman and his team assist federal law enforcement in the specialist field of lie detection. Lightman turns his talents to solving a teacher's murder.

Barney is banned from playing Laser quest. Ted tells him he's too old to play the game anyway and Barney discovers that Ted has been writing a list, the Murtaugh list.

Anna (Julie McNiven) recalls her past and Sam and Dean understand why Castiel (Misha Collins) and Uriel (Robert Wisdom) want her dead. Alastair (Mark Rolston) gets closer.

The brothers deduce a witch is sacrificing people to summon a dangerous demon. Robert Wisdom ("The Wire," "Prison Break") guest stars as Uriel, a specialist angel.

Ruby (Genevieve Cortese - "Wildfire"), Sam and Dean look for a girl (Julie McNiven - "Mad Men") who hears the angels. Castiel (Misha Collins) and Uriel (Robert Wisdom) return.

As Callie is faced with a malpractice suit, her supportive father (Hector Elizondo) visits and shares a secret; past details about Callie and Arizona's marriage are revealed.

Castiel (Misha Collins) and Uriel (Robert Wisdom) capture Alastair (Christopher Heyerdahl), and ask Dean to torture him with skills he learned in Hell.

Percy makes a move to take over the CIA, Alex goes rogue and Michael gets trapped inside Division making him unable to help Nikita, who may have to pay with her life for helping Alex.

Danny witnesses a robbery, and is forced to use his weapon, despite being off duty. Frank then discovers some troubling details about a high-ranking officer in his department.

Bodie's effort to improve sales ends disastrously and gets him a verbal lashing from Stringer Bell. Ziggy pulls Johnny Fifty into a new caper that should have the Greeks paying off big time. Undercover in the brothel, McNulty awaits rescue by the detail. Daniels and Pearlman hold their composure as Valchek fumes over the change of targets and Burrell pulls the rug from beneath him.

Vernon goes on a road trip, and Charles is offered a big opportunity from Siefert. Also, Ricky waits for a call that could change his future.

Rosie and Villa are bemused to discover that their latest murder victim already has a death certificate - from three years ago. Meanwhile, TMI attempts to reconnect with Pippy and Donna struggles to keep a secret from her family.

Dr Greene undergoes a dangerous, experimental medical procedure, and a guilt-ridden father fears for his son despite his own critical condition.

McGee goes to a women's prison to interview a suspect in a murder case. When a prison guard is murdered nearby, the prisoners take control of the wing, fearing they will be blamed for the guard's death. McGee convinces them to let him investigate the guard's murder. Now he must find the murderer amongst all the other criminals before the warden handles the situation in his own way.

Andre makes a surprising offer to Spencer, while Vernon starts to push himself harder to get back out on the field.

Andre and Spencer's rivalry intensifies, and Vernon's career hangs in the balance. Also, Jason has a potential new signing.

When a man stumbles into Magic City Lab requesting to pay in advance for his own autopsy, the team is confused, until he turns up dead the next day.

When pathology students work with the team on a cold case, their findings will impact the entire Rosewood family.